- A University of Washington multi-site trial showed that specially-designed glasses (kikkovision.com) can slow or stop childhood myopia progression, with China seeing a jump from 10–20 % to 80–90 % myopia in teens over 65 years.  
- The Sonic Eye project (YouTube pitch) is developing real-time ultrasound-to-audio down-shifting to give humans echolocation-like spatial perception; FDA restrictions on such sensory-substitution devices were noted.  
- Extended discussion explored combining echolocation with additional depth-mapping inputs—LIDAR, fast autofocus cameras, stereo vision—to create richer tactile or vibrational feedback via gloves or skin arrays for the visually impaired.  
- A 2015 talk on sensory-substitution (YouTube link) was re-shared, illustrating earlier work that maps camera or depth data to patterns of skin vibration.  
- Liquid breathing with oxygenated perfluorocarbons was briefly revisited as a potential life-support or deep-diving technology.  
- Bitcoin privacy improvements were highlighted through links to Schnorr signature basics and Seth For Privacy’s overview of upcoming proposals.  
- SpaceX received federal environmental clearance for Starship orbital launches after months of delay.  
- DIY transcripts from the Silicon Salon series (Christopher Allen intro and Tropic Square talk) were posted to diyhpl.us for open access.